G-tech drives have proved to be the more reliable among drives I've used so far.
For backup of camera data, the 3-2-1 rule works best.
3 copies, 2 different mediums, 1 copy offsite

Meaning copy camera files to two drives at shoot site. Then backup to LTO off site but as soon as possible, and place one drive and LTO away from the second drive.

For cloning camera originals ShotPut Pro works well. For cloning entire drives, Super-Duper or Carmon Copy Cloner works too. Even DaVinci Resolve, if that's in your workflow, has a clone tool to clone drives with verification.